Пускай я не распарился, купель и обливание подождут.

That is a very common point of confusion.

Пускай can mean:

• let / have someone do something
• even if / although / all right, let it be so

In this sentence, пускай introduces a kind of concession:

• Пускай я не распарился...
  = Even if I haven’t steamed up properly... / Granted that I haven’t warmed up enough...

So here it does not mean telling someone to do something. It is closer to пусть used in the sense of granted / even if / fine, maybe so.

Yes, but not a huge one.

In many contexts, пускай and пусть are interchangeable. Both can mean:

• let
• may
• even if / although

However:

• пусть is usually more neutral and more common in standard written Russian.
• пускай can sound a bit more conversational, emotional, or colloquial.

So this sentence could also be:

• Пусть я не распарился, купель и обливание подождут.

That would mean basically the same thing.

Распарился is the masculine singular past-tense form of распариться.

In a bathhouse/sauna context, распариться means something like:

• to get thoroughly steamed
• to get properly heated through
• to loosen up from steam/heat

So я не распарился means:

• I haven’t gotten properly steamed up
• I haven’t warmed up enough yet
• I’m not fully “heated through” yet

This is a very context-based word. Outside bathhouse/sauna situations, it is much less common.

Because the speaker is presumably male, the past form is распарился.
If the speaker were female, it would be:

• я не распарилась

Russian does not have a separate tense that works exactly like the English present perfect.

So where English says:

• I haven’t warmed up enough
• I haven’t gotten steamed up yet

Russian often uses the past tense with context doing the rest:

• я не распарился

This past form can describe a result relevant now. So although it is grammatically past, the meaning often overlaps with English have not + past participle.

Because the reflexive form is what you normally use when the person themselves gets steamed/heated up.

Compare:

• распарить что-то = to steam something thoroughly
• распариться = to get steamed up oneself

The -ся here does not always mean a literal oneself in English. It often marks that the subject undergoes the change of state.

So:

• Я распарился = I got thoroughly steamed/heated
• not literally I steamed myself

This is about aspect.

• распариться is perfective
• распариваться is imperfective

Here, the speaker means the result has not been achieved:

• I did not get properly steamed up
• I haven’t reached that state

That is why perfective is natural:

• не распарился

If you used не распаривался, it would sound more like:

• I wasn’t steaming up
• I didn’t use to steam up
• I wasn’t in the process of getting steamed up

That is not the idea here.

Купель is in the nominative singular.

Here it is one of the subjects of the verb подождут.

Meaning-wise, купель usually means a plunge pool, cold tub, or sometimes a font/baptismal pool, depending on context. In a bathhouse setting, it usually means some kind of tub or pool for plunging into water, often cold.

In this sentence:

• купель и обливание = the plunge pool and the dousing

Both are things the speaker is saying can wait.

Обливание comes from the verb обливать / облить — to pour over, to douse.

So обливание is a verbal noun meaning something like:

• dousing
• pouring water over oneself
• a cold-water pour

In a sauna/bathhouse context, it often refers to pouring water over the body, often cold water.

Grammatically, it is a neuter noun ending in -ие.

Because the subject is actually two things joined by и:

• купель
• обливание

Together they form a compound subject, so Russian uses a plural verb:

• купель и обливание подождут

Literally:

• the plunge pool and the dousing will wait

If there were only one subject, the verb would be singular:

• Купель подождёт.
• Обливание подождёт.

This is another aspect question.

• ждать = to wait
• подождать = to wait for a while / to wait a bit / can wait

In this sentence, подождут means something like:

• can wait
• will wait
• can be postponed for now

It has a very natural Russian sense of that can wait for later.

So:

• купель и обливание подождут

is more idiomatic than ждут here.

Ждут would mean are waiting, which is a more literal ongoing action and sounds less natural for this idea.

Because Пускай я не распарился is a subordinate clause, and the main clause is:

• купель и обливание подождут

Russian normally separates this kind of subordinate clause with a comma.

So structurally:

• [Пускай я не распарился], [купель и обливание подождут].

That comma is standard.

Yes. Russian word order is fairly flexible.

This version:

• Пускай я не распарился, купель и обливание подождут.

puts the concessive idea first:
Even if I’m not fully steamed up, the plunge pool and dousing can wait.

You could also say:

• Купель и обливание подождут, пускай я не распарился.

But that sounds less natural in many contexts, because the first version sets up the contrast more smoothly.

Russian often moves words around for emphasis, but the original order is very natural.

Not always, but in this sentence it is helpful and natural.

Russian often drops personal pronouns when the verb form already shows the subject. In theory, you could say:

• Пускай не распарился, купель и обливание подождут.

But that sounds more elliptical and context-dependent. Including я makes the contrast clearer:

• Even if I haven’t warmed up enough, ...

So я is not strictly required by grammar, but it is very natural here.

It sounds somewhat contextual and a bit expressive, mainly because of:

• пускай
• распарился
• the bathhouse vocabulary купель, обливание

It is not highly formal. It feels more like spoken or narrative Russian, especially in a sauna/banya setting.

The sentence does not sound strange, but it is tied to a specific cultural context: the banya/sauna world.

No, not in this sentence.

That would be a different structure entirely. Here пускай is not giving permission or making a command. It introduces a concession:

• Even if I’m not steamed up
• Granted, I’m not steamed up
• So what if I haven’t steamed up properly

So the sentence is not about permission. It is about dismissing that fact as not important enough to matter.

A useful way to see it is:

• Пускай + clause, main clause

Here:

• Пускай я не распарился = concessive clause
• купель и обливание подождут = main clause

This pattern often means:

• Even if X, Y
• Granted X, still Y
• All right, X may be true, but Y

So the sentence structure is essentially:

• Even if I haven’t warmed up enough, the plunge pool and dousing can wait.

That is the key grammar idea behind the whole sentence.